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Long-term effectiveness of optic nerve sheath decompression for pseudotumor cerebri
1Department of Ophthalmology, Wayne State University School of Medicine, Detroit, Mich.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|May 1, 1993
Summary
Optic nerve sheath decompression offers long-term visual preservation for most patients with pseudotumor cerebri (PTC). However, regular monitoring is crucial as visual function may deteriorate years after surgery.
Area of Science:
- Ophthalmology
- Neurology
Background:
- Pseudotumor cerebri (PTC) can lead to vision loss.
- Optic nerve sheath decompression is a surgical option for PTC.
Purpose of the Study:
- To evaluate the long-term efficacy of optic nerve sheath decompression in preserving visual function in PTC patients.
- To identify the rates of visual function stabilization, improvement, and deterioration after surgery.
Main Methods:
- Retrospective review of 32 series of postoperative visual fields.
- Analysis of 54 patients (75 eyes) with PTC undergoing optic nerve sheath decompression.
- Serial automated perimetry (Humphrey 30-2) for visual field assessment over 6 to 60 months.
Main Results:
- 68% of eyes showed improvement (36%) or stabilization (32%) of visual function.
- 32% of eyes experienced visual deterioration after initial success.
- Life-table analysis indicated a 35% probability of failure between 3 to 5 years post-surgery.
Conclusions:
- Optic nerve sheath decompression is effective in stabilizing or improving vision for the majority of PTC patients.
- Surgical failure can occur at any point after optic nerve sheath decompression.
- Routine automated perimetry is essential for long-term monitoring of PTC patients post-surgery.